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 1.     General standards.

 The general standards as adopted in the front of this publication are basic and applies to small grain.

 2.     Land requirements.

A crop of small grain will not be eligible for certification if planted on land on which a small grain crop was grown the year previous except a crop of the same variety grown from certified seed.

In fields double-cropped, neither of the two crops grown in the previous calendar year shall have been the same kind as the crop being inspected, unless they were grown from a class of certified seed of the same variety.

 3.     Field standards.

 a.     Field Inspection - At least one field inspection shall be made after the crop is fully headed when varietal or crop mixtures can best be determined.

 b.     Isolation -

(1)     Wheat, Oats, Barley, Triticale - A field shall be separated by a strip of ground adequate to prevent mechanical mixtures. The strip may be either mowed, uncropped or planted to some crop than the kind being certified.

(2)     Rye - All rye fields used for the production of certified seed must be isolated by at least 220 yards from the fields of any other variety or varieties of rye or fields of the same variety that do not meet the varietal purity requirements for certification. Isolation between diploid and tetraploid rye shall be at least 15 feet.

 c.      Specific.


Maximum Permitted in Each Class

                Factor                                     Foundation                      Registered                     Certified

                Other Varieties                           None                               1:5000                         1:2000


                * Inseparable Other Crops           None                                 None             10 plants per acre


                Inseparable Objectional Weeds   None                                   None                         None     

                                                               except                               except                          except

                                                               trace of                             trace of                        trace of

                                                               onion                                onion                       onion & trace cockle

               **Seed-borne Diseases.              1:20,000                             1:10.000                         1:200

                                                               (.005%)                              (0.01%)                         (0.5%)


*Inseparable other crops shall include crop plants, the seed of which cannot be thoroughly removed by the usual methods of cleaning. No rye in other small grains permitted.


**No tolerance for stinking smut in wheat.



4.     Seed standards.


Standards for Each Class

                                                               Foundation                             Registered                                  Certified

                     Pure Seed (minimum)

                     Wheat, Barley                         99.0%                                      99.0%                                     99.0%

                     *Oats, Rye                               98.0%                                     98.0%                                     98.0%


                     Inert Matter (maximum)

                     Wheat, Barley, Triticale          1.0%                                       1.0%                                        1.0%

                     *Oats, Rye                               2.0%                                       2.0%                                        2.0%


                     Weed Seeds                             .01%                                       .02%                                        .05%



                     Weed Seeds                        1/16 per oz.                           1/12 per oz.                                 1/8 per oz.


                     ***Other Crops                      None                                       None                                         .05%


                     Other Varieties                       None                                        .01%                                        .05%



                      Barley, Oats                            90.0%                                      90.0%                                      90.0%

                      Wheat, Rye                             85.0%                                      85.0%                                      85.0%


                      Nematodes                              None                                       None                                         None


*The purity standard for oats may be 98% provided not more than 1% of the impurities consist of impurities other than empty glumes.


**May include wild onion bulblets and wild mustard at the rate of not more than 1/16 per ounce for foundation; 1/12 per ounce for registered; 1/8 per ounce for certified. No corn cockle shall be included in this percentage.


***Registered small grain may contain .01% of the following other crop seed, red clover, lespedeza, orchardgrass, fescue, timothy and rye grass.

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Last modified: 07/17/13